America First Committee; Wikimedia Commons
Merging with the pacifist Keep America Out of War Committee in 1940, the America First Committee vigorously opposed U.S. entry into world conflict. Among the 800,000 members were Walt Disney, Gerald Ford, Sinclair Lewis, Charles Lindbergh, Sargent Shriver, Norman Thomas and Frank Lloyd Wright. The group disbanded after the Pearl Harbor attack in December 1941.